1. Distinguish between a hub and a switch in terms of how it works and the impact on network activity.

2. In the IP address 128.256.3.4 what is the network part. How do you determine this?

3. The American Registry for Internet Numbers does what? What role does it have in the increased use of IPv6 and why?

4. What is the relationship between border routers and internal routers in a corporate network? What function does each serve?

5. What can you say about the border router in the above diagram. What is 60.x.x.x mean?

6. If you have a mask of 11111111 00000000 00000000 00000000 how is this expressed in prefix notation

7. Routers and switches both direct packets to defined destinations. What is a major way in which they differ in how they do that? Which way is faster?

8. When a router examines an incoming packet, examines the routing table, and finds the first possible route, does it forward the packet? If not why?

9. What role does the mask have in determine routing decisions?

10. After examining the routing table, if the router does not find a match what is done with the incoming packet?

11. Routers typically have multiple network cards attached to them. Why?

12. What are advantages and disadvantages of router caching?

13. What are two reasons why IPv6 is not being adapted more aggressively?

14. Distinguish between spear phishing and phishing.

15. What is the technology that allows us to communicate voice messages real time over the internet?

16. Give an example of this technology.

17. Can business class commercial virus protection determine cross-site scripting? What is XXS and why can or cant it be detected by virus protection?

18. What are two advantages of UDP for use in VOIP

19. There are two general protocols needed for e-mail. What are they generally.

20. Antivirus programs are becoming less effective at identifying viruses compared to 10 or more years ago. Why is that?